hi it's trina from seeker
these days zinc is considered an
essential mineral and part of the daily
recommended allowance but before the
1960s the idea of including zinc in the
diet was controversial the discovery of
zinc's role in immunity was largely due
to a hematologist named dr prasad he
studied a group of young egyptian men
with dwarfism he suspected that their
diet lacks zinc and when he gave the men
supplements they grew about six inches
taller if you want to learn more about
zinc and its effect on the common cold
check out the episode here